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nohz: Gather tick_sched booleans under a common flag field

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Optimize the space and leave plenty of room for further flags.

Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
[ rjw: Do not use __this_cpu_read() to access tick_stopped and add
       got_idle_tick to avoid overloading inidle ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Frederic Weisbecker 2018-04-06 04:32:37 +02:00 • committed by Rafael J. Wysocki
parent 87c9fe6ee4
commit 2bc629a692
2 changed files with 15 additions and 9 deletions
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12
kernel/time/tick-sched.c
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@ -465,7 +465,9 @@ __setup("nohz=", setup_tick_nohz);
bool tick_nohz_tick_stopped(void)
{
return __this_cpu_read(tick_cpu_sched.tick_stopped);
struct tick_sched *ts = this_cpu_ptr(&tick_cpu_sched);
return ts->tick_stopped;
}
bool tick_nohz_tick_stopped_cpu(int cpu)
@ -1014,8 +1016,8 @@ bool tick_nohz_idle_got_tick(void)
{
struct tick_sched *ts = this_cpu_ptr(&tick_cpu_sched);
if (ts->inidle > 1) {
ts->inidle = 1;
if (ts->got_idle_tick) {
ts->got_idle_tick = 0;
return true;
}
return false;
@ -1161,7 +1163,7 @@ static void tick_nohz_handler(struct clock_event_device *dev)
ktime_t now = ktime_get();
if (ts->inidle)
ts->inidle = 2;
ts->got_idle_tick = 1;
dev->next_event = KTIME_MAX;
@ -1261,7 +1263,7 @@ static enum hrtimer_restart tick_sched_timer(struct hrtimer *timer)
ktime_t now = ktime_get();
if (ts->inidle)
ts->inidle = 2;
ts->got_idle_tick = 1;
tick_sched_do_timer(now);